Help: KDE- what's the difference between the address book and contacts? - KDE

This is a discussion on Help: KDE- what's the difference between the address book and contacts? - KDE ; Hi,
I using KDE 3.4/Mandriva 2006.
I don't understand why I need separate addressbook and contacts. What's more
these two are NOT synchronized:
a. When I compose (KMail) a new message, I select the recipients from the
address book.
b. ...

Help: KDE- what's the difference between the address book and contacts?

Hi,
I using KDE 3.4/Mandriva 2006.
I don't understand why I need separate addressbook and contacts. What's more
these two are NOT synchronized:
a. When I compose (KMail) a new message, I select the recipients from the
address book.
b. I can add new recipients to my address book from a mail I've received but
not to the contacts.
c. However, VCards sent to me by email are added to my contacts.

The bottom line:
1. These two are not synchronized
2. I can't find addresses appearing in my contacts and vice versa.